OK, people, let's do it.
First of all, study the links below. Carefully. Pay attention. This is the bus you're catching, make sure you pay respect to its history and the way it works. Injecting a lethal dose of heroin is one of the most popular methods of leaving this planet among drug users all over the world. Most of your questions are answered there:
1.
https://m.psychonautwiki.org/wiki/Heroin
2.
https://pubchem.ncbi.nlm.nih.gov/compound/Heroin
3.
https://wiki.tripsit.me/wiki/Heroin
H has a shelf life of 3 years according to pubchem.
The golden standard for a lethal dose is 500 mg of
pure heroin. But you're very unlikely to get pure stuff. It's probably gonna be 50% cut, or even worse. I'd recommend getting at least 1.5g for your injection, this way you can be sure you're getting the lethal dose even if it's just 30% dope. Most heroin these days doesn't need citric acid to be added before you dissolve it in water. If its a white or greyish powder, you don't need citric acid. Just add water and heat it up with a lighter or a candle. You can use a tablespoon or any other thing that works as a cooker. Look it up. Draw the stuff into the syringe through a small piece of a cigarette filter. Below is the best link on IV injections:
However, contrary to what it says there, do not insert the needle at a 45 degree angle, unless you're experienced you're not gonna pull it off. The angle should be 10-15 degrees or less. Do it slowly. When the needle is inside the vein, you'll probably feel it, I don't know how to explain this, but it makes a certain, er, sound or sensation, you can just feel the needle going through the wall of the vein. Draw a little blood into the syringe like the tutorial instructs you. Then do the injection. It's best if you do it in 4 to 5 seconds: not too fast, nor too slowly. That's it.
If you've never done IV injections, definitely practise first with saline. Practise as much as you can until you know what you're doing.
In the US and Canada, heroin is often laced with fentanyl. This is perfect for your purposes, because F is much more potent and will definitely help you ctb.
Getting H is easy af almost everywhere on the planet. If you're not OK with buying it on the DN, the easiest way is to approach a junkie on the street and ask for their help. Obviously, they're not gonna do it for free. But what do you care, right? xD If you use a drug user to get the stuff, ask them what kind it is, whether you need to add citric acid, etc. They will know.
IV is not the only way. You can do intramuscular or rectal. Intramuscular may hurt; pure H doesnt, but the stuff its usually cut with does. You can't smoke it or snort it to kill yourself, don't even try: as soon as you start you're gonna a) puke (not necessarily, but very often this is the case) b) feel amazing and not want to die. You're very likely to become an addict instead of ctb.
Now, you've got your heroin. How do you make sure it IS heroin and that it's potent enough to help you go? Any junkie I know would just do a small line (30 to 50 mg). If that amount gets you high af, it's potent, feel free to proceed if you still can. You can smoke it as well, usually off tinfoil, look it up if you need to. There are also special testing kits to gauge the potency - again, look it up if you need. I have to stress this: you won't be able to proceed after you've tried a little bit. I think using a testing kit or a drug user to gauge the potency is best here.
Make sure no one's around. Naloxone will get you back to life easily, ODing takes time.
It is absolutely painless. You're gonna black out immediately. You won't know what's hit you.
There are a lot of useful videos on YouTube if you type in 'cooking up heroin'.
PLEASE don't do it unless you're terminally ill, or things in your life are fucked up beyond hope.
Yes, that's the only way to make sure the needle is where it should be. It is very important.
Would you be prepared to help people with DN? You gave some very useful info in one of the threads yesterday, I think people would appreciate it if you put it here. I have zero experience with DN in Europe or North America.